280 Revieivs — A. Laville's Paris Tertiaries. 



liind-foot, in spite of the long Edentate claws, the general structure 

 is decidedly Perissodactyle ; although this is much less marked in 

 the carpus. The teeth, as is well known, are practically indis- 

 tinguishable from those of some of the more generalized Perisso- 

 dactyles ; and, whether it be eventually proved advisable to retain 

 Chalicotherium in that group, or to make it the representative of 

 a distinct suborder of Ungulates, we cannot agree with our author 

 in regarding it as in any way indicating an affinity between the 

 Ungulates and Edentates, which, as has been recently pointed out 

 by Dr. Ameghino, probably have a totally different phylogeny. 



In congratulating Dr. Filhol on the completion of this valuable 

 work, we cannot avoid expressing the hope that he may be induced 

 to treat the Mammals of other gisements of the typical French 

 Miocene in a similar manner. E. L. 



III. — Guide du Geologue dans le Tertiaire Parisien. Par 

 A. Laville. Pp. 24, Plates I.— X. (Paris, 1890.) 



THIS brochure will prove exceedingly useful to all students of 

 the Paris basin Tertiaries. There is no attempt at description 

 of the beds ; it commences with a table giving the subdivisions 

 and groups of the divers formations within the area; followed by 

 lists of the principal fossils found in them ; and concludes with 

 a series of ten maps of typical localities. 



In the table the Meudon Conglomerate is classified with the 

 Montian, whilst the Pisolitic Limestone is omitted, presumably 

 because the author prefers to include it in the Cretaceous. The 

 LimncBa strigosa marls form the superior limit of the Eocene, and 

 the highest bed of the Oligocene is the Beauce limestone. We 

 cannot agree with the author's classification of the Champigny lime- 

 stone with the whole of the Gypsum beds ; and we do not know 

 how the lacustrine limestone of Ducy can consistently be bracketed 

 with the upper, middle, and lower " sables moyens." If it is to be 

 included in the last-mentioned division at all, it must be placed as 

 the equivalent of the Mortefontaine beds. In regard to the fossil 

 lists, which mostly deal with Mollusca, it is evident that the author 

 has paid much more attention to some genera than to others. He 

 is very ambiguous in his nomenclature, leaving it doubtful in the 

 mind of the reader whether he intends the brackets to include 

 genera, or subgenera, or merely discarded names. The maps form 

 the most valuable portion of the work. They are extracted from 

 the Government Surveys on the 80,000 scale, and clearly indicate 

 the position of the chief sections found within the limits of each 

 district defined. The ten plates of fossils illustrate many carefully- 

 selected characteristic forms. 



IV. — The Tertiary Insects of North America. By Samuel H. 



SouDDER. Report op the United States Geological Survey 



OF THE Territories. F. V. Hayden, U.S. Geologist-in-Charge. 



Vol. xiii. 1890, 4to. pp. 734, pis. xxviii. 



ri^lHIS massive volume contains the results of more than twelve 



JL years' labour devoted to the study of the fossil Tertiary Insects 



